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嘉绍大桥桥址位于浙江省钱溏江流域,钱溏江是世界三大强涌潮河流之一,大桥桥址处河床宽浅,潮强涌急,且潮流复杂,动力强劲,不利于大型船舶通航。通过分析强涌潮的水文特点,寻找在潮汐作用下桥位水流流向、流速和水位深度随时间的变化规律,研究大型运梁船舶的选型、运输线路、候潮锚地以及船舶进出和定位作业时机,制订可行性方案,再利用实船配载适航试验,验证和完善运梁船舶进出、定位与施工作业指导书,制定相应的安全应急预案,确保了大桥安全、高效地顺利架设。
Jiashao Bridge site is located in the Qianjiang River in Zhejiang Province. Qianjiang River is one of the three strongest tidal rivers in the world. The river bridge at the bridge site is wide and shallow with strong tidal currents and complex currents with strong power, which is not good for large Navigable ships. By analyzing the hydrological characteristics of strong tide, looking for the variation of flow direction, velocity and depth of bridge water with time under the action of tide, the paper studies the selection of large-scale transporting vessel, the transportation line, the mooring anchorage and the access and positioning of ships Timing, formulate a feasibility plan, and then use the real ship stowage airworthiness test to verify and improve the ship entering and leaving the ship, positioning and construction work instructions, to develop the corresponding safety contingency plans to ensure the safe and efficient bridge erection.